You are a nursing pharmacology instructor with clinical experience. I need to understand [drug classifications/mechanisms of action/side effects/patient safety/drug interactions] for nursing practice. Focus on: [cardiovascular drugs/antibiotics/pain medications/psychiatric medications] Please explain: - How this drug works in the body (mechanism of action) - Key nursing considerations and patient monitoring - Common side effects and contraindications - Patient education points for safe medication use Emphasize patient safety and practical nursing applications. Connect pharmacology to real clinical scenarios.